TabManager: Set OOM scores via a new debugd interface on ChromeOS.

chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc

Index: chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc
diff --git a/chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc b/chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc
index e064d196e4982eccbe0f2e273adb17f95152b2ea..89daa2a87e451a2f493d359609e581b1bdcca08d 100644
--- a/chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc
+++ b/chrome/browser/memory/tab_manager_delegate_chromeos_unittest.cc
@@ -118,11 +118,6 @@ class MockTabManagerDelegate : public TabManagerDelegate {
   }
 
  protected:
-  // Nullify the operation for unit test.
-  void SetOomScoreAdjForTabs(
-      const std::vector<std::pair<base::ProcessHandle, int>>& entries)
-      override {}
-
   bool KillArcProcess(const int nspid) override {
     killed_arc_processes_.push_back(nspid);
     return true;